Is it better to block if the SPF is higher when using sunscreen?

ultraviolet-rays blocker spf

When I looked at the sunscreen, it said SPF and the number was written on it.

If SPF is high when using sunscreen, is it better to block?

Then should I choose the one with the highest number?

565 2017-06-20 Lady

A. 1

How long does the spf on the sunscreen last?
It's not better to block.

Gentleman 8 years ago 0

A. 2

It is recommended to apply sunscreen every two hours because it will wash with sweat or water.
So spf 50 doesn't mean anything.
Even spf 15 meets this condition.

Gentleman 8 years ago 0

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